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April 21, 2010
- Rhea and Edge-On Rings
- Eruption of Eyjafjallajökull Volcano, Iceland
- Hot spots on Iceland’s Eyjafjallajökull Volcano
- Dust over Pakistan and India
- Cassini Significant Events 04/14/10 – 04/20/10
- NASA Satellite Observes Iceland’s Eyjafjallajökull Volcano in Infrared
- APOD: 2010 April 21 – Wide Angle: The Cat’s Paw Nebula